You can have both browsers installed, Firefox 2 and 3, and use a diferent profile for each one.
The only restriction is that you are not able to have both opened at the same time. Ask me for details if you need help

Seems that we were gpx-spammed by a romanian user

Sorry, at the moment we are not allowed to use any of the sources you are saying.

No hay ninguna norma oficial de como clasificar las vías así que es difícil cometer fallos :D
Yo empleo en los tags las provincias, pero es a gusto del consumidor